Wash and zest the orange, then set the zest aside
Juice the orange and add enough water to equal 1 cup liquid
Bring the juice mixture almost to a boil over medium heat
Add 1 cup sugar and stir until completely dissolved and no longer gritty
Add the cranberries and soak for 10-15 minutes, stirring occasionally to coat
Line two baking sheets with foil or parchment and set a rack over one
Use a slotted spoon to lift the cranberries from the syrup, letting the excess drain
Spread the cranberries on the rack and let them rest until tacky, if they stick to your finger when touch one, they're ready to roll in sugar
Place a few cranberries in a small bowl, sprinkle with sugar, cover with a lid, and shake gently to coat
Transfer sugared cranberries to the second prepared baking sheet
Repeat with remaining cranberries and let dry completely before serving